Răspuns:
[tex]x + y = - 2.2 \\ x = \frac{65}{100} \times y \\ x = 0.65y \\ \\ 0.65y + y = 2.2 \\ 1.65y = 2.2 \\ y = \frac{2.2}{1.65} \\ y = \frac{220}{165} = \frac{44}{33} = \frac{4}{3} \\ x = \frac{65y}{100} = \frac{65}{100} \times \frac{4}{3} = \frac{ 65}{25} \times \frac{1}{3} \\ x = \frac{13}{5} \times \frac{1}{3} = \frac{13}{15} [/tex]